SHIRO-748 - Update Commons Configuration to 2.7

Author: coheigea

pom.xml

@@ -82,7 +82,7 @@
         <commons.beanutils.version>1.9.4</commons.beanutils.version>
         <commons.cli.version>1.4</commons.cli.version>
         <commons.codec.version>1.13</commons.codec.version>
-        <commons.configuration2.version>2.5</commons.configuration2.version>
+        <commons.configuration2.version>2.7</commons.configuration2.version>
         <commons.lang3.version>3.9</commons.lang3.version>
         <commons.logging.version>1.2</commons.logging.version>
         <!-- Don't change this version without also changing the shiro-ehcache and shiro-features